A vasoconstrictor which acts on dilated cranial and cerebral arterioles with action similar to ergotamine but where ergotamine is not permitted.
A stimulant, given with headache formulations to increase their effectiveness and prevent sedation.
An effective non-narcotic analgesic, which reduces the perception of pain impulses originating from dilated cerebral vessels.
Acetaminophen has been associated with cases of acute liver failure, at times resulting in liver transplant and death. Most of the cases of liver injury are assocatied with the use of acetaminophen at doses that exceed 4000 milligrams per day, and often involve more than one acetaminophen containing product.